Author Question: The bell factor for a 9-L water-sealed spirometer bell is _____ mL/mm. a. 13.5 c. 20.93 b. 29.3 ... (Read 149 times)

littleanan · **on:** Jul 16, 2018

The bell factor for a 9-L water-sealed spirometer bell is _____ mL/mm.

a. 13.5 c. 20.93
b. 29.3 d. 41.73

Question 2

Speed settings of 32 and 160 mm/min on a water-sealed spirometer can be used to measure which of the following?

1. Minute ventilation
2. Peak expiratory flows
3. Maximum voluntary ventilation
4. Forced vital capacity maneuvers
a. 1 and 2 c. 2 and 4
b. 1 and 3 d. 3 and 4

cupcake16 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
The bell factor is the number of milliliters of gas that must be displaced to cause the kymographic pen to move 1 mm. The bell factor for a 9-L bell is 20.93 mL/mm.

Answer to Question 2

ANS: B
The slower speeds (32 and 160 mm/min) are used for measuring tidal volume, minute ventilation, and maximum voluntary ventilation.